mineral processing handbook

3. material is 100 lb. per ft3, tons are 2000 lb. 4. flowability, wt. per ft3, bed depth are variables. 5. use factor of 0.8 for rip rap or clean large stone. 6. use factor of 0.7—0.9 for primary crusher. 7. variable speed drive may reduce capacity by 40% when feeder width is selected for largest stone or width of primary crusher.

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